For now, especially after seeing Juventus' performance in the Club World Cup, Juventus is still very weak to compete in Serie A next season. There are still many things that need to be changed by Igor Tudor, besides that he also has to bring in players who play as defenders and midfielders because currently Juventus' game is very difficult to create opportunities to score goals so with the existing squad I doubt Juventus can compete for the trophy next season.
Juventus believed in Tudor and gave him a contract but I think it is their risky decision and also a bad one. Juventus must start their rebuilding progress with a good head coach and Tudor is not a such one. I think it will demage Juventus performances in a next season even they will buy more players for squad improvement.
I've been telling you for a year that Juventus is in a very very bad situation, a team in disarray. If it manages to hold on despite everything, it is due, i don't know, to the strength and pride of the team, otherwise it would be even worse, trust me.
To fix it up you need to invest some money.
They have become a new Arsenal that only managed to finish Premier League in top four and nothing more, but Arteta came and changed their club performances especially in three latest seasons. Juventus have been struggling with performances in recent seasons but they are ambitious and will return to top of Serie A in future. I don't think they will accept any humble position in top four and actually aimt at higher positions especially Scudetto.
AC Milan are in bigger troubles than Juventus and perhaps this club will need more time to return to top four first, before they will be able to compete for Scudetto again.